Name________________________

CALCULATING THE MEAN #2--KEY

Directions: Calculate the mean for each set of numbers below.  To find the mean of a set of numbers, add all of the data together, then divide that sum by the amount of numbers in the set.

Example:  Here are the numbers in the set (2, 2, 8, 10, 9)

Add them together              2 + 2 + 8 + 10 + 9 = a total of 31

Divide by the amount of numbers in the set             31 divided by 5 gives you a mean of 6.2

SUM                           DIVIDED BY                        MEAN

1)         (4, 4, 6, 8,)                                         __22___                                  _4_                                ___5.5_

2)         (2, 4, 4, 6, 1, 4)                                  __21___                                  _6_                                ___3.5_

3)         (12, 14, 10,)                                       __36___                                  _3_                                __12___

4)         (9, 2, 5, 7, 5)                                      __28___                                  _5_                                ___5.6_

5)         (1, 2, 4, 6, 1, 6, 8)                               __28___                                 _7_                                ___4___

6)         (12, 4, 16, 10,)                                    __42___                                 _4_                                __10.5_

7)         (10, 4, 6, 10, 4)                                  __34___                                  _5_                                ___6.8_

8)         (22, 9, 8, 11,)                                     __50___                                  _4_                                __12.5_

9)         (16, 8, 15, 11, 7)                                __57___                                  _5_                                __11.4_

10)       (1, 2, 3, 5, 1, 4, 6, 1, 2, 2)                   __27___                                 _10__                            ___2.7_

EXTENSION:  List all of the means from #1-10 in order from least to greatest.

2.7, 3.5, 4, 5.5, 5.6, 6.8, 10.5, 11.4, 12, 12.5